Quickly send an Apple Push Notification

apn-server.rb

cert = File.read(File.join(RAILS_ROOT, 'config', 'apns-dev.pem'))
ctx = OpenSSL::SSL::SSLContext.new
ctx.key = OpenSSL::PKey::RSA.new(cert, '') #set passphrase here, if any
ctx.cert = OpenSSL::X509::Certificate.new(cert)

sock = TCPSocket.new('gateway.sandbox.push.apple.com', 2195) #development gateway
ssl = OpenSSL::SSL::SSLSocket.new(sock, ctx)
ssl.connect
  
payload = {"aps" => {"alert" => "Oh hai!", "badge" => 1, "sound" => 'default'}}
json = payload.to_json()
token =  [token.delete(' ')].pack('H*') #something like 2c0cad 01d1465 346786a9 3a07613f2 b03f0b94b6 8dde3993 d9017224 ad068d36
apnsMessage = "\0\0 #{token}\0#{json.length.chr}#{json}"
ssl.write(apnsMessage)
  
ssl.close
sock.close